Boston Fed Research Confirms APR Increases Significantly Reduce Credit Card Spending

Research from the Boston Federal Reserve provides empirical evidence that credit card interest rates directly influence consumer spending behavior.

The study found that a 1 percentage point increase in APR leads to approximately a 9% decline in credit card spending the following month. Researchers characterized this response as "economically meaningful," demonstrating clear price elasticity in how consumers use credit cards when borrowing costs rise.

The findings add quantitative support to long-standing economic theory about how pricing affects consumer behavior. The magnitude of the spending reduction—9% for each percentage point of rate increase—suggests that APR changes represent a significant factor in cardholders' spending decisions, rather than a negligible cost.

This research comes as credit card debt continues to grow sharply. Recent data shows that while American incomes have risen 22%, credit card debt has surged 54%, indicating consumers are relying more heavily on credit despite higher borrowing costs in the current rate environment.